How To Fix SPN063 - No User Principal Name exists

SAP Error Message - Details

• Message type: E = Error

• Message class: SPN - SPnego

• Message number: 063

• Message text: No User Principal Name exists

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SPN063 - No User Principal Name exists ?

  The SAP error message SPN063 "No User Principal Name exists" typically occurs in the context of SAP systems that are integrated with Microsoft Active Directory (AD) for authentication purposes, particularly when using Kerberos authentication. This error indicates that the system is unable to find a User Principal Name (UPN) for the user trying to log in.
  Cause:
  
  Missing UPN in Active Directory: The user account in Active Directory does not have a User Principal Name assigned. The UPN is usually in the format of [e-mail].
  Incorrect Configuration: The SAP system may not be correctly configured to communicate with Active Directory, or the user may not be part of the expected domain.
  User Account Issues: The user account may be disabled, deleted, or not properly synchronized with the SAP system.
  Kerberos Configuration Issues: There may be issues with the Kerberos configuration, such as incorrect service principal names (SPNs) or key distribution center (KDC) settings.
  
  Solution:
  
  
  Check User Account in Active Directory:
  
  Ensure that the user account exists in Active Directory.
  Verify that the UPN is correctly set for the user. You can do this by checking the properties of the user account in Active Directory Users and Computers.
  
  
  
  Update UPN:
  
  If the UPN is missing, you can add or update it in the user properties in Active Directory. Make sure it follows the correct format.
  
  
  
  Verify SAP Configuration:
  
  Check the SAP system configuration for Kerberos authentication. Ensure that the SAP system is correctly set up to communicate with Active Directory.
  Verify the settings in the SAP GUI or SAP NetWeaver for the correct domain and authentication method.
  
  
  
  Check SPNs:
  
  Ensure that the correct Service Principal Names (SPNs) are registered for the SAP service account in Active Directory. You can use the setspn command to view and manage SPNs.
  
  
  
  User Account Status:
  
  Ensure that the user account is active and not locked or disabled.
  
  
  
  Kerberos Configuration:
  
  Review the Kerberos configuration on both the SAP server and the Active Directory side. Ensure that the KDC is reachable and that the time settings are synchronized between the SAP server and the AD server.
  
  
  
  Related Information:
  
  Documentation: Refer to SAP's official documentation on integrating SAP with Active Directory and Kerberos authentication for detailed steps and best practices.
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to SPN063 or Kerberos authentication.
  Active Directory Tools: Use tools like Active Directory Users and Computers, setspn, and klist to troubleshoot and manage user accounts and SPNs.
  
  By following these steps, you should be able to resolve the SPN063 error and ensure that users can authenticate successfully.